检索结果-南通市图书馆

Novel Adaptive Binarization Method for Degraded Document Images

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第6期67卷 3815-3832页

作者： Siti Norul huda Sheikh Abdullah Saad M.Ismail Mohammad Kamrul Hasan Palaiahnakote Shivakumara Center for Cyber Security Faculty of Information Science and TechnologyUniversiti Kebangsaan MalaysiaSelangor43600Malaysia The Faculty of Computer and Information Sciences Aljouf UniversitySaudi Arabia Faculty of Computer Systems and Information Technology University of MalayaMalaysia

Achieving a good recognition rate for degraded document images is difficult as degraded document images suffer from low contrast,bleedthrough,and nonuniform illumination *** the existing baseline thresholding techniques that use fixed thresholds and windows,the proposed method introduces a concept for obtaining dynamic windows according to the image content to achieve better *** enhance a low-contrast image,we proposed a new mean histogram stretching method for suppressing noisy pixels in the background and,simultaneously,increasing pixel contrast at edges or near edges,which results in an enhanced *** the enhanced image,we propose a new method for deriving adaptive local thresholds for dynamic *** dynamic window is derived by exploiting the advantage of Otsu *** assess the performance of the proposed method,we have used standard databases,namely,document image binarization contest(DIBCO),for *** comparative study on well-known existing methods indicates that the proposed method outperforms the existing methods in terms of quality and recognition rate.

关键词： Global and local thresholding adaptive binarization degraded document image image histogram document image binarization contest

Studying the Equilibrium Points of the Modified Circular Restricted Three-body Problem: The Case of Sun–Haumea System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2023年第11期23卷 232-242页

作者： INurul huda B.Dermawan M.B.Saputra R.Sadikin T.Hidayat Research Center for Computing National Research and Innovation AgencyBogorIndonesia Department of Astronomy and Bosscha Observatory FMIPAInstitut Teknologi BandungBandungIndonesia

We intend to study a modified version of the planar Circular Restricted Three-Body Problem(CRTBP) by incorporating several perturbing parameters. We consider the bigger primary as an oblate spheroid and emitting radiation while the small primary has an elongated body. We also consider the perturbation from a disk-like structure encompassing this three-body system. First, we develop a mathematical model of this modified *** have found there exist five equilibrium points in this modified CRTBP model, where three of them are collinear and the other two are non-collinear. Second, we apply our modified CRTBP model to the Sun–Haumea system by considering several values of each perturbing parameter. Through our numerical investigation, we have discovered that the incorporation of perturbing parameters has resulted in a shift in the equilibrium point positions of the Sun–Haumea system compared to their positions in the classical CRTBP. The stability of equilibrium points is investigated. We have shown that the collinear equilibrium points are unstable and the stability of non-collinear equilibrium points depends on the mass parameter μ of the system. Unlike the classical case, non-collinear equilibrium points have both a maximum and minimum limit of μ for achieving stability. We remark that the stability range of μ in non-collinear equilibrium points depends on the perturbing parameters. In the context of the Sun–Haumea system, we have found that the non-collinear equilibrium points are stable.

关键词： celestial mechanics Kuiper Belt:general planets and satellites:dynamical evolution and stability

Mechanical and thermodynamical stability of BiVO4 polymorphs using first-principles study

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2017年第3期26卷 395-403页

作者： A K M Farid UI Islam Md Nurul huda Liton H M Tariqul Islam Md Al Helal Md Kamruzzaman Department of Computer Science and Engineering Begum Rokeya University Rangpur Rangpur-5400 Bangladesh Department of Physics Begum Rokeya University Rangpur Rangpur-5400 Bangladesh Department of Chemistry Begum Rokeya University Rangpur Rangpur-5400 Bangladesh Department of Physics and Materials Science and Center of Super-Diamond and Advanced Films (COSDAF) City University of Hong Kong Hong Kong SAR China

First principles calculations of structural, electronic, mechanical, and thermodynamic properties of different poly- morphs of BiVO4 are performed using Bender-type plane/wave ultrasoft pseudopotentials within the generalized gradient approximation （GGA） in the flame of density functional theory （DFT）. The calculated structural and electronic properties are consistent with the previous theoretical and experimental results. The electronic structures reveal that m-BiVO4, op- BiVO4, and st-BiVO4 have indirect band gaps, on the other hand, zt-BiVO4 has a direct band gap. From the DOS and Mulliken＇s charge analysis, it is observed that only m-BiVO4 has 6s2 Bi lone pair. Bond population analysis indicates that st-BiVO4 shows a more ionic nature and a similar result is obtained from the elastic properties. From the elastic prop- erties, it is observed that st-BiVO4 is more mechanically stable than the others, st-BiVO4 is more ductile and useful for high electro-optical and electro-mechanical coupling devices. Our calculated thermodynamic properties confirm the similar characteristics found from electronic and elastic properties, m-BiVO4 is useful as photocatalysts, solid state electrolyte, and electrode and other polymorphs are applicable in electronic device fabrications.

关键词： BiVO4 crystal structure lone pair mechanical stability

Health Emergency and Disaster Risk Management: Five Years into Implementation of the Sendai Framework

在线全文

学校读者我要写书评

暂无评论

International Journal of Disaster Risk Science 2020年第2期11卷 206-217页

作者： Natalie Wright Lucy Fagan Jostacio MLapitan Ryoma Kayano Jonathan Abrahams Qudsia huda Virginia Murray Global Public Health Public Health EnglandLondon SE18UGUK Disaster Risk Management and Resilience Unit Health Security Preparedness DepartmentWorld Health OrganizationGeneva 1211Switzerland WHO Centre for Health Development(WHO Kobe Centre) KobeHyogo 651-0073Japan

The Sendai Framework for Disaster Risk Reduction 2015–2030 recognizes health at the heart of disaster risk management(DRM)at the global policy *** years on,it has catalyzed the rapid development of the field of Health Emergency and Disaster Risk Management(Health EDRM)by providing a mandate for building partnerships as well as enhancing scientific *** milestones achieved include publication of the World Health Organization’s Health EDRM Framework,development of the WHO Thematic Platform for Health EDRM and the WHO Health EDRM Research Network,and further application of health information principles to ***,health actors at all levels have continued to engage in the Sendai Framework processes and have had a key role in its implementation and proposed *** have been significant gains made through the partnership of health and DRM,but the relationship has not been without its *** national,regional,and global initiatives continue to operate with a lack of consistency and of linkages to respond to the Sendai Framework’s call for embedding health resilience in DRM,and conversely,embedding DRM in health *** this hurdle is important,and doing so will be a key marker of success of the next 10 years of partnership under the Sendai Framework.

关键词： Data collection Disaster risk management Health emergencies Research networks Sendai Framework

On the QoS for ATM Networks Using a New Buffer Utilization Technique

在线全文

学校读者我要写书评

暂无评论

光学学报 2003年第S1期23卷 705-706页

作者： Md. Julius Hossain Md. Nurul huda Department of Computer Science University of Dhaka Dhaka BangladeshDepartment of Computer Science University of Dhaka Dhaka Bangladesh

A buffer sharing scheme need to meet many competing objectives like robustness to changes in traffic conditions, fairness, efficiency, implementation simplicity, etc. Of the existing techniques, Push Out (PO) is optimum in terms of overall cell loss performance, but its delay performance is worse than that of all other methods for the multiple space priority. Another scheme named Dynamic Threshold (DT) is robust and adaptive which has good delay performance. A hybrid technique named Dynamic Threshold wi...

关键词： ATM in on for On the QoS for ATM Networks Using a New Buffer Utilization Technique

Quantitative Comparison of Calcium Hydroxide Removal by EndoActivator, Ultrasonic and ProTaper File Agitation Techniques: An in vitro Study

在线全文

学校读者我要写书评

暂无评论

Journal of Huazhong University of Science and Technology(Medical Sciences) 2013年第1期33卷 142-145页

作者： huda Yasir Khaleel Ahmed Jawad Al-Ashaw 杨焰逄爱慧马净植 Department of Stomatology Tongji HospitalTongji Medical CollegeHuazhong University of Science and Technology Conservative Department College of DentistryMosul University

Calcium hydroxide （CH） dressing residues can compromise endodontic sealing. This study aimed to evaluate the amount of remaining CH in root canals after mechanical removal by four groups of irrigation techniques including needle irrigation only, ProTaper file, EndoActivator, and ultrasonic file. Fifteen extracted single-rooted teeth were collected and used for all four groups. The samples were firstly prepared by ProTaper rotary instruments, and then sectioned longitudinally through the long axis of the root canals, followed by final reassembling by wires. CH was kept in the canals for 7 days setting. The removal procedure began with 5 mL of 2.5% sodium hypochlorite （NaOC1） followed by 1 mL of 17% ethylenediaminetetraacetic acid and a final irrigation with 5 mL of 2.5% NaOC1 solution for all groups. No additional agitation of the irrigant was performed in group 1, while agitation for 20 s be- tween irrigants was done with F2 ProTaper rotary file in group 2, EndoActivator with tip size 25/.04 in group 3 and by an ultrasonic file 25/.02 in group 4. The total activation time was 60 s. The roots were then disassembled and captured by digital camera. The ratio of CH coated surface area to the surface area of the whole canal as well as each third of the canal was calculated. The data were statistically ana- lyzed by one-way ANOVA using post hoc Tukey test. Results showed that none of the four techniques could remove all CH. No significant difference was found between EndoActivator and ultrasonic tech- niques. However, they both removed significantly more CH than ProTaper and needle irrigation （P=0.0001）. In conclusion, the sonic and ultrasonic agitation techniques were more effective in removing intracanal medicaments than the ProTaper rotary file and needle irrigation in all thirds of the canal.

关键词： calcium hydroxide removal irrigation ProTaper EndoActivator ultrasonic

Serum vascular endothelial growth factor as a tumor marker for hepatocellular carcinoma in hepatitis C virus-related cirrhotic patients

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2021年第6期13卷 600-611页

作者： Ahmed Alzamzamy huda Elsayed Mona Abd Elraouf Hanan Eltoukhy Tarek Megahed Ashraf Aboubakr Department of Gastroenterology and Hepatology Military Medical AcademyCairo 11841Egypt Department of Gastroenterology and Hepatology Maadi Armed Forces Medical ComplexCairo 11841Egypt Department of Internal Medicine Faculty of Medicine for GirlsAl-Azhar UniversityCairo 11311Egypt Department of Clinical Pathology Military Medical AcademyCairo 11311Egypt

BACKGROUND Hepatocellular carcinoma(HCC)accounts for 8.2%of all cancer-related deaths *** a vascular tumor,vascular endothelial growth factor(VEGF)plays a vital role in HCC pathogenesis,growth,and *** To determine the accuracy of serum VEGF and VEGF/platelet(PLT)as tumor markers in the early detection of HCC cases in patients with hepatitis C virus(HCV)-related liver *** We conducted a case-control study with HCV patients from the outpatient and inpatient hepatology *** were classified into three groups:(1)HCC group;(2)Cirrhosis group;and(3)HCV without cirrhosis(control group).Patients were clinically evaluated,and blood samples were drawn for the analysis;serum VEGF levels were measured by a specific VEGF human recombinant enzyme-linked immunosorbent assay *** from the three study groups were compared by the one-way analysis of variance or Kruskal-Wallis *** operating characteristic curves were constructed to determine the optimal cut-off values of alpha fetoprotein(AFP),VEGF,and VEGF/PLT that provided the best diagnostic *** sensitivity and specificity at the optimal cut-off value of each biomarker were then *** This study included one hundred patients(HCC,cirrhosis,and control groups:n=40,30,30,respectively).HCC patients had significantly higher serum VEGF and VEGF/PLT levels than the non-HCC groups(P=0.001).Serum VEGF and VEGF/PLT showed significant positive correlations with and HCC tumor size,stage,vascular invasion,and Child-Pugh ***,a VEGF cut-off the value of 250 pg/mL provided 80%sensitivity and 81.7%specificity for discriminating HCC patient from non-HCC ***,the ratio of VEGF/PLT provided sensitivity and specificity of 77.5%and 80%,respectively which is higher than the accuracy provided by *** combination of AFP,VEGF,and VEGF/PLT increases the accuracy of diagnosing HCC to>95%.CONCLUSION In HCV patients,serum VEGF and VEGF/PLT separ

关键词： Hepatocellular carcinoma Vascular endothelial growth factor Biomarkers Diagnosis

Agarose coated micro-bottle sensor for relative humidity detection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics Letters 2021年第6期17卷 328-333页

作者： huda Adnan Zain Malathy Batumalay Md Ashadi Md Johari Kaharudin Dimyati Sulaiman Wadi Harun Department of Electrical Physics University of MalayaKuala Lumpur 50603Malaysia Faculty of Information Technology INTI International UniversityNilai 71800Malaysia Faculty of Electrical and Electronic Engineering Technology Universiti Teknikal Malaysia MelakaMelaka 76100Malaysia Department of Physics Faculty of Science and TechnologyAirlangga UniversitySurabayaIndonesia

The whispering gallery mode(WGM)based micro-bottle resonator(MBR)sensor has been proposed and demonstrated for relative humidity measurement by using an agarose gel as a *** was fabricated by using a soften-and-compress method to form a 190μm bulge *** micro-bottle was optically excited by a 3μm tapered fiber and it exhibits a resonance with a Q factor in an order of 10^(5).The agarose coated MBR produces a good sensing response towards humidity with the sensitivity of 0.107 d B/%RH and linearity of 99.614%.The agarose hydrophilic nature and its changing porosity and refractive index with increasing relative humidity made the coated MBR structure to be more sensitive than the uncoated *** humidity sensor has a simple fabrication and is showing good sensitivity,linearity,resolution,response time and operational in a wide humidity range.

关键词： structure. humidity bottle

Hepatic senescence, the good and the bad

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2019年第34期25卷 5069-5081页

作者： Nazmul huda Gang Liu Honghai Hong Shengmin Yan Bilon Khambu Xiao-Ming Yin Department of Pathology and Laboratory Medicine Indiana University School of MedicineIndianapolis

Gradual alterations of cell’s physiology and functions due to age or exposure to various stresses lead to the conversion of normal cells to senescent *** becoming senescent,the cell stops dividing permanently but remains metabolically *** senescence does not have a single marker but is characterized mainly by a combination of multiple markers,such as,morphological changes,expression of cell cycle inhibitors,senescence associatedβ-galactosidase activity,and changes in nuclear *** cells in an organ become senescent,the entire organism can be *** may occur through the senescence-associated secretory phenotype(SASP).SASP may exert beneficial or harmful effects on the microenvironment of *** on senescence has become a very exciting field in cell biology since the link between age-related diseases,including cancer,and senescence has been *** loss of regenerative and homeostatic capacity of the liver over the age is somehow connected to cellular *** major contributors of senescence properties in the liver are hepatocytes and *** cells in the liver have been implicated in the etiology of chronic liver diseases including cirrhosis and hepatocellular carcinoma and in the interference of liver *** review summarizes recently reported findings in the understanding of the molecular mechanisms of senescence and its relationship with liver diseases.

关键词： Senescence Senescence associated secretory phenotype Hepatocyte Cholangiocyte Hepatic stellate cell Cell cycle arrest DNA damage